Pressure-reducing valve.



No. 827,998. PATENTED AUG. '7, 1906.

L. SOHUTTE. PRESSURE REDUCING VALVE.

2 SHEETS-SHEET l.

APPLICATION FILED JULY 7, 1904.

, L. SOHUTTE.

PRESSURE REDUCING VALVE. APPLICATION FILED JULY 7, 1904.

PATENTED AUG. 7, 1906.

2 SHEETS-SHEET 2.

" best understood as described in connection' a pressure-reducing valve constructed in ac-- UNITED, STAiIlES PATENT OFFICE.

ouis SOHUT'ITE, or PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO SCHUTTE AND SYLVANIA, A

PFu-zssuns-ssoucmg VALVE.

Specification of Letters Patent. Application filed July 7,1904. Satin-1N0. 215.640.

To all whom it may concern:

Be it known that I, LOUIS SoHUTTE, a citizen of the United States of America, residing in the city and county of Philadelphia, in the State of Pennsylvania,have invented a certain new and useful Improvement in Pressure-Reducing Valves, of which the following is a true and exact description, reference being had to the accompanying drawings, which form a part thereof. A

My invention relates to what are known as pressure-reducing valves, and has for its object to providea valve of this character of simple, eflicient, and generally improved construction. "Q j The nature of my improvements will be with the drawin s which illustrate my invention, and in w%1ich i Figure 1 is a vertical sectional elevation of cordance'with my invention; Fig. 2, a similar elevation of a modifiedform of valve also embodying y im rovements, and Fi 3 a similar elevation s owing another an preferred modification.

A and A. indicate, respectivel the hi h and low pressure sides orcham ers'of t "e valve-casing, which are in communication through the valve-seated port indicated at A a differential c linder situ- B B represent with the va ve-port and ated directly in line a the smaller section B of which should be of practically the same internal diameter as the. efie'ctive outer diameter of the pressure-reducinglvalve.

B indicates the top or cover ofthe valvecasin which in this construction forms the close head of the differential cylinder.

B is a portcommunicating with the lower end of the larger cylinder-section B and having, as shown 'in Fig. 1, a valve seat B formed in it and also nearer to its outerend a second valve-seat B 1) indicates an exhaust-pipe leading from the up er end of port B.

In t e construction in single valve-seat B is made to serve the purpose of the two seatsin Fig. 1.

In Fig. 3 the port B connects with a port B in head 'B, which 0 ens into -a cylinderport B, having a latera port B,- which 0on nects with an outlet-conduit B". the seat the cylinder, as

"ing' an a v on the valve-seat B is a hand-operatedvalve adapted to seat In Fig. 2 the valve indicated atd. is adapted to seat 'a cage G D, as shown, (permittlngsome freedom of movement, sai rod being attached to valve dicated in 2 a and seat B on port B asshown.

p B, Fig. 1 ,is a port leading from the upper end of the larger cylinder-section B and communicating with the low-pressure side A of the valve-casing. The valve-seat B is provided in this port. i In Fig. 2 I have shown a second alterna: tive, in which the port indicated at B and having a valve-seat B is formed .through the reducing-valve. I

In Fig. 3 the e uivalent ort opens from s own at I3, includin a valve-chamber at the "base of cylinder and a valve-seat B 0, Figs. 1, 2, and 3, indicates a pressureregulating valve, which in the construction shown in Fig. 1 is held port B by the action of the adustable weight C acting through the lever theseat B by the action of an ad,- justable spring, (indicated at C (3'3) indicatjustable screw for regulating the tension of the spring. hand-operated valve adapted to seat itself of the port B. D, Fig. 1 itself onthe seat B of the portB.

itself on the seat B of the'port B, and in this construction the valve is operated by the threaded rod F F, a similar rod being shown J Patented Aug.'7,1906.

D, Fig. 1, indicates a B being formed on the end of cylinderB to the seat B in the I while in the construction shown in Figs. 2 and 3 the valve C is held to also in Fig. 1, but having no connection with a similar valve.

In the construction of Fig. 3 the arran e ment of the Borts is suchas to bring t e valvesD and G extending down through cylinder-port B and having a piston Z secured to it, which prevents communication between the twoports,

which embraces the head of a rod D and normally pressed down to its limit of movement by a spring D, theconstruction being such that the valve- D Breferablycloses slightly in advance of valve E is the ressure-reducmg valve, adapted to seat itsef on the port A and firmly secured to the'differential piston indicatedat in line, so that they can both be operated by a single hand-wheel G, a rod 7 while below the piston is secured port of the loosely- E E the piston-section E glinder-section B, while the piston-"section 3 fits in the cylinder-section B. E indiof the differential piss shown, with t e valve E, the piston-section "having, essentially, the same area the effective area of the valve E. At E, I have indicated a space or chamber intervening between the pistonand the cylinder, and with which space or chamber the; port B communicates. 4

Referring first to the construction shown in Fig. 1, I would'state that under normal operative conditions the valves D and D are both opened and the counter-weight hold ing the \valve C to its seat adjusted so'that said valve is held to its seat a pressure b slightly greater than the desired pressure on the low-pressure side of the valve-casing, the difference being such as would compensate for the weight of the valve and piston. Under these conditions the ressure on the 7 upper side of the differentia piston will be equal to that on the low-pressure side of the.

casing,'which is in free communication with the to of the c finder-section B through the The uid on the high-pressure side i'ston will find its way past the tting piston E and into vport B. and will exert on the lower side of the larger section of the differential piston the ressure providedfor by-the' adjustment of t a valve 0." Whatever leakage occurs piston IE will not vary the upper side of that through the pressure on the piston, since the top of the cylinder is in'free communication with f crease above the determined 45 the low=pressure side of the valve. Under these conditions itwill be obvious that the pistonand the attached reducing-valve E will be moved -p wheneverthe pressure on the low-pressure .side' of the valve-casing falls. below that provided for, while any in: low pressure would result in moving the piston and-valve downward. When it 1' gessure-reducing valve E, I 'clos e the valve in, the port B thus cuttlng oil the comdifferential side of the casing and ermitti'n' the pres? sure in the cylinder by eakage t ough the piston E to become equal to that existing Under these conditions in the chamber E the pressure-reducing valve will be moved to and. heldto its seat and the energfy with which the valve is held to its seat is nr-ther increased hy-.-closing--the valve D, which causes the pressure at the top ofthe differential 'cylinderto gradually become equal with that on the high-pressure side of the valve-casing and also prevents less of pres-f sure fluid through the port Bi.

" In the modified'construction of Fig. 2 the i normal adjustment is one in which the valve fittigg the 1preferably formed integral, as,

placing the top of the diiierential cy inderin free communication with the low-pressure adiustment of the valve 0 is that in which it is eld. to its seat'by pressure corresponding to a fluid-pressure in the port B slightly greater than-that desired in the low-pressure side of the valve-casing. Under these conditions the valve will work exactly as in the construction of Figgl, and whenit is desired to close the valve the stem F is moved downward, carrying with it the valve at, until it seats itself on the port B Thereupon, as before, the pressure at the top of the difler= ential piston will increase until it equals that of the chamber E and the pressuresreducing valve willmove down to its seat. (1 of course is to be pushed down as the re= ducing-valve moves toward its seat. The

s desired to close the.

further increase of pressure at the top of the pressure flui avoided byscrewing down the spring-adjusting device 0 so-that the valve 0 will be held to its seat by a'pressure exceeding that of the high-pressure side of the casing. v

In the construction of Fig. 1 the threaded stem F is simply useful to clamp the reducing-. valve to its seat" and to press it to its seat in seat and to enable the engineer to determine whether the valve is properly seated.

To provide against carelessness or igno rance, which might lead to the closing of valve D, leavin valve D open, thereby raising valve E to t the differential piston, I prefer to provide mechanism for opening and closing said valves practically simultaneously, the valve D closing, preferably, .slightlyin advance of valve D, and this is very conveniently done a by the construction illustrated in Fig. 3. and

a ready described so far as it differs from the other modifications illustrated. The. main. advanta e of In consists in the devices y whic the reducingvalve is closed or brought into operative con dition by the use of easily-handledvalves controlling the ports in as. above describe I claim as new, and desire. to secure by Let ters'Patent, isf

1. A'pressure-reducing valve having in combination a valve casing divided by a sectiona'a di erential cylinder B,'B, secure in line with the valvesseat in the high-pres:- sure section of the casing, having a part B, connectingwith the lower end of the larger section of the cylinder and a port connecting the upper end ofsaid cylinder-section to the low-pressure side of the casing, a differential side of the valve-casing, while the normal The valve differential cylinder is secured and a loss of d is raised, leaving theport B 0 on and p case of resistance tending tohold it above its construction.

small, inexpensive, and

- communication with the differential cylinder, Having now described my invention, what 4 valve-seated 1 port into high and low pressure cylinder to the low-pressure side of the casing. 2. A pressure-reducing valve having in combination a valve-casing divided by a trolling pressure in port B a va valve-seated ort into high and low pressure sections, a di erential cylinder B, B, secured in line with the valve-seat in the high-pressure section of the casing, having a port B connecting with the lower end of the larger section of the cylinder and a port connecting the upper end of said cylinder-section to the low-pressure side of the casing, a differential piston E, E Workingin the cylinder B, B, a reducing-valve E, secured to said piston, a pressure-regulating valve conve for closing the ort leading from the top of the differentia cylinder to the low-pressure side of the casing and independent means for positively closing port B 3. A pressure-reducing valve having in combination a valve-casing divided by a valve-seated port into high and low pressure sections, a differential cylinder B, B, secured in line with the valve-seat in the high-pressure section of the casing, havin a port B connecting with the lower end 0 the larger section of the cylinder and a port connecting the upper end of said cylinder-section to the low-pressure side of the casing, piston E, E working in the cylinder B, B, a reducing-valve of substantially the same area as that of the smaller piston-section E, of the difierential piston secured to said piston, a pressure-re ulatin valve, controlling pressure in port an a valve for closing the port leading from the top of the differential cylinder to the low-pressureside of the casing. 4. A pressure-reducing valve having in combination a valve-casing divided by a valve-seated port into high and low pressure sections, a differential cylinder B, B secured in line with the valveseat in the high-pressure section of the casing, having a port B connecting with the lower end of the larger section of the cylinder, and a port connecting the upper end of the differential cylinder with the low-pressure side of the casing, a

differential piston E, E working in the cylinder B, B, a reducing-valve E, secured to said piston, a pressure-regulating valve regulating the pressure in port B other means for positively closing both ports leading from the differential cylinder and actuating mechanism whereby the said opened practically together.

a LOUIS SOHUTTE.

Witnesses:

CHAS. F. MYERS, D. STEWAR'I.

a differential ports are closed and 

